Wi wilkinson



Lpwlmmson. Tire Upsettin g.

No. 70,664. Patented 'Nov. 5, 1867.

N. PETERS, Fhoio Liihcgrapher, Washingtnn, D. C.

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IMPROVEMENT 11v susnvxme TIRE.

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TO ALL WHOM IT MAY concnniv i Be it known that I, LEVI WILKINSON, of the city andcouuty of New Haven, in the State of Connecticut,

l have invented a new and useful Improvement in Shrinking Carriage-Wheel Tire; and I do hereby declare that the following is a full, clear, and exact description of .the construction, character, and operation of the same, reference being bad. to the accompanying drawings, which make part'of this specification, in which- Figure 1 is a plan-of the device or apparatus, showing a tire in'the position for being shrunk.-

Figure 2 is a perspective view of the apparatus ready to receive the tire to he shrunk, showing the binding-- screws, 860- v 1 My improvement consists in makinga machine or tool of a suitable block, with two brackets, in which I fit two binding-screws, to hold the tire in place while being shrunk, and two gauge-screws, to be usedto gauge the tire laterally, when thought best.

I make the block A of wrought iron or any other suitable material, substantially in the form shown in fig. 2, and indicated in longitudinal section in fig. 1, with its centre somewhat depressed to suit the curve of; the tire as nearly as may be foundconvenient'. On this block I lit two brackets, as represented at B and 0, making the projecting parts so long that the points a and 6 of the screws .0 and d'will he, at least, so far from the edge .as to fall on the lateral centre of the tire, as indicated in fig. 2, and I make the screws of a length and strength to hold ,the tire firmly, in place whilebeing shrunk om-educed with the hammer. If the screw has been turned on a male centre, and its outer surface has been turned conical, it will make the binding power double, that is,

seas to act with both male and female centres or points. If thought best, screws may be inserted at the back of each bracket, as shown at .g and h, to 'be turned in as gauges for holding the tire, though they are not deemed very material. v a

I make the-heads of the binding-screws with suitable wheels or 'rims, as c and al for turning them down, or

v I use a lever or crankias represented in dots at l, fig. 1. g

-Having made the parts as, described, and arranged thcm'as represented in fig. 2, I measure the curved 4 measure.

surfaceof the block A from the point ll to the point 6 of the screws 0 and d, and mark the tire, as at the point a, and. then measure the length of the tire needed for the wheel, less the distance from a to b, and mark it again.

I then heat the tire, and bend'it inward, as represented at D, fig. 1, until the two markson the tire correspond with the points a and b of the binding-screws, and, having heated that short portio n of the tire to a hammering heat, I place'it in the machine and turn down the binding-screws untiltheir-pcints a and I) firmly press the tire onto-the block A, where they'will hold it, at those two points, perfectly immovable. I then hammer that portion of the tire down to the surface of the block A, .when the tire will be. of the exact length desired. Thus I avoidthe trouble of cutting and'welding the tire, while the shrinking is done with exact certainty to the What I claim as my invention, and desire to secure by Letters'Patent, is .The combination of the block A and brackets B and C with the screws 0 and d andg and h, when the whole is constructedand fitted to produce the result, substantially as herein described and set'forth..

LEV I WILKINSON. Witnesses:

R. FITZGERALD, WILLIAM A. BULL. 

